READ 1->https://blog.csdn.net/unique_perfect/article/details/116378091#t42
READ 2->https://www.bilibili.com/video/BV1Qv41167ck?p=7
https://juejin.cn/post/6954633587119521806
1.0 安装Ubuntu Server 20.10
使用的是VirtualBox，以及桥接网卡模式，LinuxMint20.1
首先去清华源下载ubuntu server20.10 虚拟机安装，安装的时候配置清华源。
安装之后我这里为了防止重启IP变化配置了静态IP
root@master:~# cat /etc/netplan/00-installer-config.yaml
# This is the network config written by 'subiquity'
network:
ethernets:
enp0s3:
dhcp4: false
addresses: [192.168.1.72/24]
optional: true
gateway4: 192.168.1.1
nameservers:
addresses: [8.8.8.8,119.29.29.29]
version: 2
root@master:~#
需要启动sshd服务，以及修改/etc/sshd/sshd_config
PermitRootLogin yes
允许使用密码登录
同时，修改root密码
sudo passwd
安装三台分别是master node1 node2，使用tmux远程登录，同时操作这三台设备
image.png
1.1 配置DNS/HOSTS
vim /etc/hosts 追加
192.168.1.72 master
192.168.1.71 node2
192.168.1.66 node1
1.2 配置时间时区
https://blog.csdn.net/zhengchaooo/article/details/79500032
查看时间是否同步
timedatactl
output
System clock synchronized: yes
1.3 关闭iptables
root@master:~# ufw disable
Firewall stopped and disabled on system startup
1.4 关闭SELINUX
apt install policycoreutils
sestatus
我这里已经默认是关闭的。
如果需要手动关闭，参考
https://linuxconfig.org/how-to-disable-enable-selinux-on-ubuntu-20-04-focal-fossa-linux
1.5 关闭swap
https://graspingtech.com/disable-swap-ubuntu/
设置完之后重启设备
1.6 安装docker
apt install docker.io
配置镜像
https://segmentfault.com/a/1190000023117518
1.7 br_netfilter
lsmod |grep br_netfilter
sysctl -a|grep net.bridge.bridge-nf
READ->https://zhuanlan.zhihu.com/p/138554103
在Ubuntu 20.04 Server上，这个值就是1。如果你的系统上不一致，使用下面的命令来修改：
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sudo sysctl --system
1.8
#修改/etc/sysctl.d/10-network-security.conf
gemfield@ai05:~$ sudo vi /etc/sysctl.d/10-network-security.conf
#将下面两个参数的值从2修改为1
#net.ipv4.conf.default.rp_filter=1
#net.ipv4.conf.all.rp_filter=1
#然后使之生效
gemfield@ai05:~$ sudo sysctl --system
1.9 安装kubelet等
sudo apt-get update && sudo apt-get install -y ca-certificates curl software-properties-common apt-transport-https curl
curl -s https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo apt-key add -
sudo tee /etc/apt/sources.list.d/kubernetes.list <<EOF
deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
EOF
sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl
1.10 准备镜像(master节点)
参考： https://juejin.cn/post/6954633587119521806
detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd".
vim vim /etc/docker/daemon.json
"exec-opts": ["native.cgroupdriver=systemd"]
防止找不到image
docker tag coredns/coredns:1.8.0 registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:v1.8.0
1.11 创建master(master节点)
kubeadm init --pod-network-cidr 172.16.0.0/16 --image-repository registry.cn-hangzhou.aliyuncs.com/google_containers
成功之后
Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Alternatively, if you are the root user, you can run:
export KUBECONFIG=/etc/kubernetes/admin.conf
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
https://kubernetes.io/docs/concepts/cluster-administration/addons/
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 192.168.1.72:6443 --token s5q4qq.uah55zwhi2q4uv9p \
--discovery-token-ca-cert-hash sha256:c2d67ffba7b56b22c282921f204cb2eefe8e226856e76aff1482da1480630a75
执行
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
1.11 子节点加入主节点(node1或node2节点)
到node1或者node2执行
kubeadm join 192.168.1.72:6443 --token s5q4qq.uah55zwhi2q4uv9p \
--discovery-token-ca-cert-hash sha256:c2d67ffba7b56b22c282921f204cb2eefe8e226856e76aff1482da1480630a75
此时还是节点未准备状态
root@master:~# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master NotReady control-plane,master 13m v1.21.2
node1 NotReady <none>
1.13 子节点和主节点网络插件
还需要安装网络插件
wget https://docs.projectcalico.org/manifests/calico.yaml
修改calico.yaml文件，取消注释
- name: CALICO_IPV4POOL_CIDR
value: "172.16.0.0/16"
然后
kubectl apply -f calico.yaml
等待一两分钟，执行下面的命令，应该就正常了Ready状态
kubectl get nodes
1.14 创建Nginx容器运行在K8S中
kubectl create deployment nginx --image=nginx:1.14-alpine
查看暴露端口
root@master:~# kubectl get pods,service
NAME READY STATUS RESTARTS AGE
pod/nginx-65c4bffcb6-4cjxd 1/1 Running 0 15m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 39m
service/nginx NodePort 10.99.164.24 <none> 80:31279/TCP 14m
找到节点master ip 我这里是
http://192.168.1.72:31279/
访问，是Nginx，那么测试学习环境搭建完毕
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